[Sajen]

Originally Posted by Flavio

Hi Detlef!

here is a page from Tribal Arms Monographs n°2 you can see your example in pic. 55, mine in pic. 59 (or also in pic. 54). The one showed in pic. 55 it's before 1912. The tribes are the same.
The author (Christian Gosseau) says the only difference is in the decoration: LOBALA used "a round-headed hammer that produces circular, rather large stamps"; the NGBAKA and BONDJO used "an other type of hammer with a head carrying sometimes some short bulging lines gives smaller prints, often accompanied by short lines in Vs"
"Ngbaka, Bondjo and Lobala are names given to the part of the NGBAKA people installed on the right bank of the UBANGI, in former FRENCH EQUATORIAL AFRICA"

I don't know if the dimensions are indicators of age

Regards
FLavio

Thank you very much for showing this plate from Gosseau, very informative!